Rs-232 Troubleshooting - Agilent Technologies E3647A User Manual

Chapter 3 Front-Panel Operation and Features
RS-232 Interface Reference
DB-25 Serial Connection If your computer or terminal has a 25-pin serial port with
a male connector, use the null-modem cable and 25-pin adapter included with the
Agilent 34398A Cable Kit. The cable and adapter pin diagram are shown below.
5182-4794
Cable
Instrument
DCD
1
RX
2
TX
3
DTR
4
GND 5
DSR 6
RTS 7
8
CTS
RI 9
DB9
DB9
Female
Male

RS-232 Troubleshooting

Here are a few things to check if you are having problems communicating over the
RS-232 interface. If you need additional help, refer to the documentation that came
with your computer.
• Verify that the power supply and your computer are configured for the same baud
rate, parity, and number of data bits. Make sure that your computer is set up for 1
start bit and 2 stop bits (these values are fixed on the power supply).
• Make sure to execute the SYSTem:REMote command to place the power supply
in the remote mode.
• Verify that you have connected the correct interface cable and adapters. Even if
the cable has the proper connectors for your system, the internal wiring may be
incorrect. The Agilent 34398A Cable Kit can be used to connect the power supply
to most computers or terminals.
• Verify that you have connected the interface cable to the correct serial port on your
computer (COM1, COM2, etc.).
66
5181-6641
Adapter
1 1
2
2
3 3
4
4
5 5
6
6
7
7
8 8
9
9
DB9
DB9
Female
Male
PC
2
TX
3 RX
4 RTS
5 CTS
DSR
6
GND
7
8 DCD
DTR
20
DB25
DB25
Female
Male